firing pin ![添加此单词到默认生词本](http://www.dict.li/user/images/new_vocabulary.gif)
击针
firing pin[ noun ]
striker that ignites the charge by striking the primer
<noun.artifact>
Firing pin \Fir"ing pin`\
In the breech mechanism of a firearm, the pin which strikes
the head of the cartridge and explodes it.
[Webster 1913 Suppl.]